Helcionelloida
Sign in to savethumb|Yochelcionella cyrano thumb|Pelagiella atlantoides Helcionelloida is an extinct group of ancient molluscs (phylum Mollusca). These are the oldest known conchiferan molluscs, that is, they had a mineralised shell. Some members of this class were mistaken for Monoplacophorans. The class was erected by Peel in 1991.
Wikidata facts
- Parent taxon
- Conchifera
- Image
- Helcionellid NT.jpg
Show 3 more facts
- taxon name
- Helcionelloida
- taxon rank
- class
- Commons category
- Helcionelloida
Sources (1)
via Wikidata · CC0
~2 min read
Encyclopedic overview
5 sectionsContents
- Anatomy
- 2005 taxonomy
- 2006-2007 taxonomy
- References
- External links
thumb|Yochelcionella cyrano thumb|Pelagiella atlantoides Helcionelloida is an extinct group of ancient molluscs (phylum Mollusca). These are the oldest known conchiferan molluscs, that is, they had a mineralised shell. Some members of this class were mistaken for Monoplacophorans. The class was erected by Peel in 1991.
==Anatomy==
Excerpted from Wikipedia’s “Helcionelloida” article, available under the CC BY-SA 4.0 licence.